2 Answers
2

The beta uses the repositories as they are updated -- it is not a fixed snapshot of Ubuntu as it was when the beta was released.

If there are no more updates to be installed, then congratulations! You are running the final Ubuntu release. There is nothing else you need to do.

Here, have a totally simplified, consumer-side view of a release I hacked together in ten minutes:

In this chart, when you run apt-get update, you discover there is a next dot you can hop to. When you run apt-get upgrade you hop to it. Version numbers are attached to some dots and cd images are made for that. The gold release is just one hop like any other one. Upgrading distros changes the line you are in.

You may want to add that anywhere along a repo's timeline that the next set of repos exist, will let you run sudo upgrade-manager -d to change to the next higher set of repos, in this case to the 11.04 ones. You will also go straight (or nearly so) to the current update of 11.04. You do not need to dist-upgrade via an alpha/beta release if there are later ones available.
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BeowulfNode42Apr 5 '14 at 2:50

As psusi mentioned you will stay up to date via synaptics. However, one word of warning. Back up your config files just in case. I have had updates destroy my xorg.conf before and ended up having to reinstall. Wasn't a huge deal, but hours of custimization work was undone.
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CtuchikMar 29 '11 at 15:44